9/1/2023 0 Comments Vw golf coolant cap![]() The only way you would see any considerable amount of pressure in the cooling system on a cold engine is if you have a leak between the combustion chamber and the water galleries. The system should pressurise as it gets hot, but should return to atmospheric pressure once the engine has cooled. This doesn't mean it's safe to unscrew the coolant cap on a hot engine though, just because there's no super heated steam doesn't mean you can't burn yourself. I topped it up on Thursday with a bit of water and done about 150 miles since then and its now just flashed again!!Ĭoolant in a GTi (unless the engine has problems) is very rarely above 100'c. Its a 2007 Golf Match 1.9 TDI with 98k and no issues ever!!Įvery time I open the coolant it lets out air, the level of coolant goes above the max when I remove the cap, but when the cap is on it drops below the min a little. I have been told it could be the head gasket on its way out ? I really hope not as I haven't had any problems with my car since I have had it 6 years now. Also took it to a guy I know in Kwik Fit who just could see no leaking either. No obvious leaks or anything.But they just changed one or two little parts no big job done. They changed one or two pipes which had slight kinks but they didn't think that would be causing the leaking. Happened again a few months later- they did a overnight test and was OK no leaking. Happened again a few months later they did a pressure test for me- all OK. ![]() Happened again 2 they said to up with a little water. Called them up and they said it's probe air in the system and should sort itself out. I took my car for a cam belt change and water pump change at the VW Dealer and since then I remember the same day it flashed saying it needed me to top up the coolant. ![]() I wonder if you can help me, I have had this problem for about 2 years now but it seems to getting worse over the last few weeks.
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